cyan problem TASKalfa 2353ci

[dikyo]

Hi Guys,

I have a problem with cyan on this machine.
(see attach.)

I already replaced:
all developer and drum units
Main high voltage pwb
Parts pwb Drum Dlp connect
Feed Image pwb
Engine pwb


Problem is not solved yet.

Any suggestion is welcome

Thanks in advance

Grtz

Dikyo

[blackcat4866]

Do you see this pattern on the developing roller? Are you using genuine toner? =^..^=

[avio2]

Hi Guys,

I have a problem with cyan on this machine.
(see attach.)

I already replaced:
all developer and drum units
Main high voltage pwb
Parts pwb Drum Dlp connect
Feed Image pwb
Engine pwb


Problem is not solved yet.

Any suggestion is welcome

Thanks in advance

Grtz

Dikyo

dv unit is news?
before change dv and dk have turno off and disconect ac cable?

[sparkycivic]

I'm going to throw out a guess of: LSU. Only because I cannot imagine how a mechanical issue can do this since so many parts have already been replaced.

This unit uses a LSU with four lasers, and a common polygon motor, so perhaps the cyan laser is somehow malfunctioning? Also there is no feedback inside the LSU for verifying color laser operation, only black so cmy laser malfunction will not result in any failure code except for calibration fail C76XX.

I also notice that the area which SHOULD be cyan, is not, but instead continues the background pattern.

[toddanderson]

Run a copy with the cyan main charge roller removed and post the sample.

I'm going to throw out a guess of: LSU. Only because I cannot imagine how a mechanical issue can do this since so many parts have already been replaced.

This unit uses a LSU with four lasers, and a common polygon motor, so perhaps the cyan laser is somehow malfunctioning? Also there is no feedback inside the LSU for verifying color laser operation, only black so cmy laser malfunction will not result in any failure code except for calibration fail C76XX.

I also notice that the area which SHOULD be cyan, is not, but instead continues the background pattern.

[dikyo]

Hi ,

Thanks for so far.

This pattern is also visible on the drum.


Off course we use original toner.

When i am back at the customer I'll post some examples.

grtz

Dikyo

[pascalb.]

Hello,
Personally I think a cyan bias problem.
have you checked the high voltage?

[dikyo]

Hi Guys,

After replacing the Main highvoltage pwb for the second time the problem was solved.

grtz

Dikyo